In this video/lesson series we will explore the way venomous sea snails paralyze, then kill, their prey. We profile 21st Century Chemist Mande Holford of the City University of New York, who is working to synthesize these biotoxins and develop powerful new painkillers. Also in this collection: news stories from the archives of NBC News and Scientific American on snail, spider and cobra venom, and on pain sensation and control - and a "universal" pain-rating scale.